Techniques to dynamically configure target bitrate for streaming network connections

ABSTRACT

Techniques to dynamically configure target bitrate for streaming network connections are described. An apparatus may comprise a streaming component operative to establish a streaming network connection with a second client device at a first client device; and a stream configuration component operative to determine inter-arrival rate information for the streaming network connection; provide the inter-arrival rate information to an inter-arrival rate analysis component; receive a preliminary target bitrate from the inter-arrival rate analysis component in response to providing the inter-arrival rate information to the inter-arrival rate analysis component; determine round-trip time information for the streaming network connection; determine an assigned target bitrate and a packet size setting for the streaming network connection based on the preliminary target bitrate and the round-trip time information; and configure the streaming component to perform the streaming network connection with the assigned target bitrate and the packet size setting. Other embodiments are described and claimed.

RELATED APPLICATIONS

This application is a continuation of, claims the benefit of andpriority to previously filed U.S. patent application Ser. No.14/859,141, titled “Techniques to Dynamically Configure Target Bitratefor Streaming Network Connections,” filed on Sep. 18, 2015, which ishereby incorporated by reference in its entirety.

This application is also related to the U.S. patent application Ser. No.14/858,492, titled “Techniques to Dynamically Configure Jitter BufferSizing,” filed on Sep. 18, 2015, which is hereby incorporated byreference in its entirety.

BACKGROUND

Users of mobile devices, such as smartphones, may use their mobiledevices to execute applications. These applications may performcommunications and network tasks on behalf of their user. An applicationmay comprise a messaging client for communication between users. Thiscommunication may include the transmission of streaming content,including streaming audio content such as a voice-over-Internet-Protocol(VoIP) communication exchange.

SUMMARY

The following presents a simplified summary in order to provide a basicunderstanding of some novel embodiments described herein. This summaryis not an extensive overview, and it is not intended to identifykey/critical elements or to delineate the scope thereof. Some conceptsare presented in a simplified form as a prelude to the more detaileddescription that is presented later.

Various embodiments are generally directed to techniques to dynamicallyconfigure target bitrate for streaming network connections. Someembodiments are particularly directed to techniques to dynamicallyconfigure target bitrate for streaming network connections based oninter-arrival rate and round-trip time. In one embodiment, for example,an apparatus may comprise a streaming component operative to establish astreaming network connection with a second client device at a firstclient device; and a stream configuration component operative todetermine inter-arrival rate information for the streaming networkconnection; provide the inter-arrival rate information to aninter-arrival rate analysis component; receive a preliminary targetbitrate from the inter-arrival rate analysis component in response toproviding the inter-arrival rate information to the inter-arrival rateanalysis component; determine round-trip time information for thestreaming network connection; determine an assigned target bitrate and apacket size setting for the streaming network connection based on thepreliminary target bitrate and the round-trip time information; andconfigure the streaming component to perform the streaming networkconnection with the assigned target bitrate and the packet size setting.Other embodiments are described and claimed.

To the accomplishment of the foregoing and related ends, certainillustrative aspects are described herein in connection with thefollowing description and the annexed drawings. These aspects areindicative of the various ways in which the principles disclosed hereincan be practiced and all aspects and equivalents thereof are intended tobe within the scope of the claimed subject matter. Other advantages andnovel features will become apparent from the following detaileddescription when considered in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an embodiment of a network stream configurationsystem.

FIG. 2 illustrates an embodiment of a messaging system.

FIG. 3 illustrates an embodiment of a streaming network connection beingconfigured.

FIG. 4 illustrates an embodiment of the streaming component and streamconfiguration component.

FIG. 5 illustrates an embodiment of a branching logic flow for thesystem of FIG. 1.

FIG. 6 illustrates an embodiment of a logic flow for the system of FIG.1.

FIG. 7 illustrates an embodiment of a centralized system for the systemof FIG. 1.

FIG. 8 illustrates an embodiment of a distributed system for the systemof FIG. 1.

FIG. 9 illustrates an embodiment of a computing architecture.

FIG. 10 illustrates an embodiment of a communications architecture.

FIG. 11 illustrates an embodiment of a radio device architecture.

DETAILED DESCRIPTION

The streaming of media content, such as media content captured locallyon a mobile device—for instance, the streaming of live audio during aVoIP call or the streaming of live video during a video call—may beperformed based on the assignment of a target bitrate to a streamingcomponent responsible for the encoding and/or transmission of thestreaming media content within limits based on the target bitrate. Themedia content may be encoded in order to fit within the limit defined bythe target bitrate, with the target bitrate thereby serving as a maximumlimit for the encoding of media content. This target bitrate may bedetermined based on the gathering of network performance information inorder to prevent overwhelming a network connection. An overwhelmednetwork connection may result in delay or periodic interruption in thedelivery of the media content, which may result in unsatisfactoryplayback of the media content, particularly where the media content isimmediate and live and particularly where the media content is part ofan interactive exchange (e.g., an interactive audio or video call),where the use of lengthy (e.g., more than one second) buffers introducesdetectable lag in the exchange. Further, various network parameters,such as packet size, may be configured to improve network performancefor the delivery of content within the target network bitrate. As aresult, the embodiment can improve the performance and user experienceof exchanging streaming media content between devices. These embodimentsmay be particularly useful in which one or more of the devices areoperating on network of marginal capability for streaming networkcontent, such as cellular data networks. While the embodiments may beappropriate for the transmission of live-captured media content, theymay also be applied to the streaming of pre-recorded media content,particularly where that pre-recorded media content is encoded,re-encoded, or transcoded in parallel with the transmission of the mediacontent such that its encoding parameter(s) may be adjusted based onnetwork performance.

Reference is now made to the drawings, wherein like reference numeralsare used to refer to like elements throughout. In the followingdescription, for purposes of explanation, numerous specific details areset forth in order to provide a thorough understanding thereof. It maybe evident, however, that the novel embodiments can be practiced withoutthese specific details. In other instances, well known structures anddevices are shown in block diagram form in order to facilitate adescription thereof. The intention is to cover all modifications,equivalents, and alternatives consistent with the claimed subjectmatter.

It is worthy to note that “a” and “b” and “c” and similar designators asused herein are intended to be variables representing any positiveinteger. Thus, for example, if an implementation sets a value for a=5,then a complete set of components 122 illustrated as components 122-1through 122-a may include components 122-1, 122-2, 122-3, 122-4 and122-5. The embodiments are not limited in this context.

FIG. 1 illustrates a block diagram for a network stream configurationsystem 100. In one embodiment, the network stream configuration system100 may comprise a computer-implemented system having softwareapplications comprising one or more components. Although the networkstream configuration system 100 shown in FIG. 1 has a limited number ofelements in a certain topology, it may be appreciated that the networkstream configuration system 100 may include more or less elements inalternate topologies as desired for a given implementation.

A messaging system 110 may be generally arranged to receive, store, anddeliver messages. The messaging system 110 may store messages whilemessaging clients, such as may execute on client devices 120 are offlineand deliver the messages once the messaging clients are available. Themessaging system 110 may empower the engagement and performance of othercommunication tasks, such as audio and/or video calls.

A plurality of client devices 120 may operate as part of the networkstream configuration system 100, transmitting messages and otherwisecommunicating between each other as part of a messaging system 110. Theclient devices 120 may execute messaging clients for the messagingsystem 110, wherein each of the client devices 120 and their respectivemessaging clients are associated with a particular user of the messagingsystem 110. In some embodiments, the client devices 120 may be cellulardevices such as smartphones and may be identified to the messagingsystem 110 based on a phone number associated with each of the clientdevices 120. In some embodiments, the client devices 120 may beidentified to the messaging system 110 based on a user accountregistered with the messaging system 110—and potentially a socialnetworking system that comprises or is associated with the messagingsystem 110—and logged into from the messaging client executing on theclient devices 120. In general, each messaging client may be addressedthrough various techniques for the reception of messages. While in someembodiments the client devices 120 may comprise cellular devices, inother embodiments one or more of the client devices 120 may includepersonal computers, tablet devices, any other form of computing devicewithout limitation. Personal computers and other devices may access amessaging system 110 using web browser accessing a web server, forinstance.

Streaming network connections within the messaging system 110 may beperformed directly or via relay servers 190. A direct streaming networkconnection may correspond to a connection in which the outgoing networkpackets from one client device are addressed to either the destinationclient device or to a device directly masquerading as the destinationclient device, such as where a national address translation (NAT) deviceis used. NAT may be performed by, for example, routers used in theproviding of home, business, or other local networks. A relayedstreaming network connection may correspond to a connection in which theoutgoing network packets from one client device are addressed to a relayserver provided as part of the messaging system 110, the relay serverthen forwarding the network packets to the destination client device.Relay servers 190 may be used, for instance, to bridge NAT devices thatare not configured to sufficiently expose a destination client devicefor the performance of a direct connection.

The client devices 120 may communicate using wireless transmissions toexchange network traffic. Exchanging network traffic, such as may beincluded in the exchange of messaging transactions, may comprisetransmitting and receiving network traffic via a network interfacecontroller (NIC). A NIC comprises a hardware component connecting acomputer device, such as each of client devices 120, to a computernetwork. The NIC may be associated with a software network interfaceempowering software applications to access and use the NIC. Networktraffic may be received over the computer network as signals transmittedover data links. The network traffic may be received by capturing thesesignals and interpreting them. The NIC may receive network traffic overthe computer network and transfer the network traffic to memory storageaccessible to software applications using a network interfaceapplication programming interface (API). The network interfacecontroller may be used for the network activities of the embodimentsdescribed herein.

Network stream configuration system 100 may include an authorizationserver (or other suitable component(s)) that allows users to opt in toor opt out of having their actions logged by network streamconfiguration system 100 or shared with other systems (e.g., third-partysystems), for example, by setting appropriate privacy settings. Aprivacy setting of a user may determine what information associated withthe user may be logged, how information associated with the user may belogged, when information associated with the user may be logged, who maylog information associated with the user, whom information associatedwith the user may be shared with, and for what purposes informationassociated with the user may be logged or shared. Authorization serversor other authorization components may be used to enforce one or moreprivacy settings of the users of network stream configuration system 100and other elements of a messaging system through blocking, data hashing,anonymization, or other suitable techniques as appropriate. Forinstance, a user may be empowered to configure privacy settingsdetermining whether network usage, such as streaming communication, islogged by the network stream configuration system 100 and analyzed. Insome embodiments, a user may be presented with information regarding maybe collected and how that information may be used, such as informing theuser that collected information may be anonymized prior to analysis.

FIG. 2 illustrates an embodiment of a plurality of servers implementingvarious functions of a messaging system 200. It will be appreciated thatdifferent distributions of work and functions may be used in variousembodiments of a messaging system 200. The messaging system 200 maycomprise the network stream configuration system 100 with the operationsof the network stream configuration system 100 comprising a portion ofthe overall operations of the messaging system 200. The illustratedembodiment of the messaging system 200 may particularly correspond to aportion of the messaging system 110 described with reference to FIG. 1comprising one or more server devices providing messaging services tothe user of the messaging system 200.

The messaging system 200 may comprise a domain name front end 210. Thedomain name front end 210 may be assigned one or more domain namesassociated with the messaging system 200 in a domain name system (DNS).The domain name front end 210 may receive incoming connections anddistribute the connections to servers providing various messagingservices.

The messaging system 200 may comprise one or more chat servers 215. Thechat servers 215 may comprise front-end servers for receiving andtransmitting user-to-user messaging updates such as chat messages.Incoming connections may be assigned to the chat servers 215 by thedomain name front end 210 based on workload balancing.

The messaging system 200 may comprise backend servers 230. The backendservers 230 may perform specialized tasks in the support of the chatoperations of the front-end chat servers 215. A plurality of differenttypes of backend servers 230 may be used. It will be appreciated thatthe assignment of types of tasks to different backend serves 230 mayvary in different embodiments. In some embodiments some of the back-endservices provided by dedicated servers may be combined onto a singleserver or a set of servers each performing multiple tasks dividedbetween different servers in the embodiment described herein. Similarly,in some embodiments tasks of some of dedicated back-end serversdescribed herein may be divided between different servers of differentserver groups.

The messaging system 200 may comprise one or more offline storageservers 231. The one or more offline storage servers 231 may storemessaging content for currently-offline messaging endpoints in hold forwhen the messaging endpoints reconnect.

The messaging system 200 may comprise one or more sessions servers 232.The one or more session servers 232 may maintain session state ofconnected messaging endpoints.

The messaging system 200 may comprise one or more presence servers 233.The one or more presence servers 233 may maintain presence informationfor the messaging system 200. Presence information may correspond touser-specific information indicating whether or not a given user has anonline messaging endpoint and is available for chatting, has an onlinemessaging endpoint but is currently away from it, does not have anonline messaging endpoint, and any other presence state.

The messaging system 200 may comprise one or more push storage servers234. The one or more push storage servers 234 may cache push requestsand transmit the push requests to messaging endpoints. Push requests maybe used to wake messaging endpoints, to notify messaging endpoints thata messaging update is available, and to otherwise performserver-side-driven interactions with messaging endpoints.

The messaging system 200 may comprise one or more chat activitymonitoring servers 235. The one or more chat activity monitoring servers235 may monitor the chats of users to determine unauthorized ordiscouraged behavior by the users of the messaging system 200. The oneor more chat activity monitoring servers 235 may work in cooperationwith the spam logging servers 239 and block list servers 236, with theone or more chat activity monitoring servers 235 identifying spam orother discouraged behavior and providing spam information to the spamlogging servers 239 and blocking information, where appropriate to theblock list servers 236.

The messaging system 200 may comprise one or more block list servers236. The one or more block list servers 236 may maintain user-specificblock lists, the user-specific incoming-block lists indicating for eachuser the one or more other users that are forbidden from transmittingmessages to that user. Alternatively or additionally, the one or moreblock list servers 236 may maintain user-specific outgoing-block listsindicating for each user the one or more other users that that user isforbidden from transmitting messages to. It will be appreciated thatincoming-block lists and outgoing-block lists may be stored incombination in, for example, a database, with the incoming-block listsand outgoing-block lists representing different views of a samerepository of block information.

The messaging system 200 may comprise one or more last seen informationservers 237. The one or more last seen information servers 237 mayreceive, store, and maintain information indicating the last seenlocation, status, messaging endpoint, and other elements of a user'slast seen connection to the messaging system 200.

The messaging system 200 may comprise one or more profile photo servers238. The one or more profile photo servers 238 may store and makeavailable for retrieval profile photos for the plurality of users of themessaging system 200.

The messaging system 200 may comprise one or more spam logging servers239. The one or more spam logging servers 239 may log known andsuspected spam (e.g., unwanted messages, particularly those of apromotional nature). The one or more spam logging servers 239 may beoperative to analyze messages to determine whether they are spam and toperform punitive measures, in some embodiments, against suspectedspammers (users that send spam messages).

The messaging system 200 may comprise one or more statistics servers240. The one or more statistics servers may compile and store statisticsinformation related to the operation of the messaging system 200 and thebehavior of the users of the messaging system 200.

The messaging system 200 may comprise one or more sync servers 241. Theone or more sync servers 241 may sync the messaging system 240 withcontact information from a messaging endpoint, such as an address bookon a mobile phone, to determine contacts for a user in the messagingsystem 200.

The messaging system 200 may comprise one or more web servers 242. Theone or more web servers 242 may engage in hypertext transport protocol(HTTP) and hypertext transport protocol secure (HTTPS) connections withweb browsers. The one or more web servers 242 may, in some embodiments,host the remote web server 350 as part of the operation of the messagingweb access system 100.

The messaging system 200 may comprise one or more key servers 243. Theone or more key servers 243 may host public keys for public/private keyencrypted communication.

The messaging system 200 may comprise one or more group servers 244. Theone or more group servers 244 may maintain lists of groups, add users togroups, remove users from groups, and perform the reception, caching,and forwarding of group chat messages.

The messaging system 200 may comprise one or more multimedia database(MMD) servers 245. The MMD servers 245 may store a database, which maybe a distributed database, of media objects known to the messagingsystem 200. In some embodiments, only media objects currently stored orotherwise in-transit within the messaging system 200 may be tracked bythe MMD servers 245. In other embodiments, the MMD servers 245 maymaintain a record of media objects that are no longer in-transit, suchas may be for tracking popularity or other data-gathering purposes.

The MMD servers 245 may determine the storage location of media objectswhen they are to be stored by the messaging system 200, such as onmultimedia servers 246. The MMD servers 245 may determine the existingstorage location of media objects when they are to be transmitted by themessaging system 200, such as which of a plurality of multimedia servers236 store a particular media object. The MMD servers 245 may generatethe uniform resource locators (URLs) for use by messaging clients torequest and retrieve media objects. The MMD servers 245 may track when amedia object has been corrupted or otherwise lost and should bereacquired.

The messaging system 200 may comprise one or more multimedia servers246. The one or more multimedia servers may store multimedia (e.g.,images, video, audio) in transit between messaging endpoints, multimediacached for offline endpoints, and may perform transcoding of multimedia.

The messaging system 200 may comprise one or more payment servers 247.The one or more payment servers 247 may process payments from users. Theone or more payment servers 247 may connect to external third-partyservers for the performance of payments.

The messaging system 200 may comprise one or more registration servers248. The one or more registration servers 248 may register new users ofthe messaging system 200.

The messaging system 200 may comprise one or more voice relay servers249. The one or more voice relay servers 249 may relayvoice-over-internet-protocol (VoIP) voice communication betweenmessaging endpoints for the performance of VoIP calls.

FIG. 3 illustrates an embodiment of a streaming network connection beingconfigured.

A first client device 320 may engage in a streaming network connectionwith a second client device 325. Each of the first client device 320 andsecond client device 325 may execute an instantiation of a messagingclient 310. In some cases, the client devices 320, 325 may executeinstantiations of different messaging clients that conform to asufficiently common specification to empower interoperability.

In some cases, the streaming network connection may be a directconnection 330 in which the outgoing network packets from the firstclient device 320 are addressed to the public-facing address associatedwith the second client device 325 and the outgoing network packets fromthe second client device 325 are addressed to the public-facing addressassociated with the first client device 320. In other cases, thestreaming network connection may be a relayed connection 335 in whichthe outgoing network packets from the first client device 320 and secondclient device 325 are addressed to a relay server 390, with the relayserver 390 operative to forward network packets received from one clientdevice to the other client device. A relay server 390 may comprise onerelay server of a plurality of relay servers 190 provided as part of amessaging system 110.

A messaging client 310 may comprise a streaming component 340, thestreaming component generally arranged to establish and carry out theperformance of a streaming network connection carrying streaming mediacontent. The streaming component 340 may provide network performanceinformation to a stream configuration component 350, such as round-triptime information 375 and inter-arrival rate information 370.

Round-trip time information 375 may indicate the round-trip time for oneor more network packets transmitted as part of the streaming networkconnection. The round-trip time for a particular network packettransmitted by a transmitting client device may comprise the amount oftime lapsed between the transmission of the particular network packetand the receipt by the transmitting client device of an acknowledgementfrom the receiving client device of the reception of that particularnetwork packet by the receiving client device. The round-trip timeinformation 375 may comprise a plurality of round-trip times for aplurality of network packets transmitted by the first client device 320and/or second client device 325. The round-trip time information 375 maycomprise a mean, median, mode, or other holistic measure of anaggregated collection of round-trip times for network packetstransmitted as part of the streaming network connection.

Inter-arrival rate information 370 may indicate the inter-arrival ratefor two or more network packets transmitted as part of the streamingnetwork connection. A streaming component 340 may receive a sequence ofnetwork packets, with the inter-arrival rate for any two network packetsin sequence being the amount of time between the reception of the twonetwork packets. The inter-arrival rate information 370 may comprise aplurality of inter-arrival rates for a plurality of network packetsreceived in sequence. The inter-arrival rate information 370 maycomprise a mean, median, mode or other holistic measure of an aggregatedcollection of inter-arrival rates for the network packets transmitted aspart of the streaming network connection.

The network performance information may be generated locally on thefirst client device 320 and/or may be generated on the second clientdevice 325 and provided to the first client device 320 by the secondclient device 325 as part of the performance of the streaming networkconnection. The first client device 320 may also provide networkperformance information to the second client device 325 as part of theperformance of the streaming network connection.

A messaging client 310 may comprise a stream configuration component350. The stream configuration component 350 may be generally arranged toconfigure encoding parameters and/or network parameters for theperformance of the streaming network connection. The streaming component340 may be assigned an assigned target bitrate 390 for the streamingmedia content and encode the media content for the streaming networkcontent according to the assigned target bitrate 390. Encoding the mediacontent to the assigned target bitrate 390 may comprise providing theassigned target bitrate 390 to an encoding routine, which may operateaccording to the known techniques for bitrate-limited encoding of mediacontent. The streaming component 340 may be generally arranged totransmit the encoded media content across the streaming networkconnection. The transmission of the encoded media content may beperformed using network parameters assigned to the streaming component340, such as a packet size setting 395 defining the network packet sizefor the network streaming connection.

The stream configuration component 350 may determine the assigned targetbitrate 390 based on a preliminary target bitrate 380 determined by aninter-arrival rate analysis component 360. An inter-arrival rateanalysis component 360 may be generally arranged to determine apreliminary target bitrate 380 based on an analysis routine operatingexclusively based on inter-arrival rate information 370. The streamconfiguration component 350 may submit the inter-arrival rateinformation 370 to the inter-arrival rate analysis component 360 andreceive the preliminary target bitrate 380 from the inter-arrival rateanalysis component 360. The inter-arrival rate analysis component 360may generate the preliminary target bitrate 380 according to knowntechniques for determining a preliminary target bitrate 380 frominter-arrival rate information 370.

FIG. 4 illustrates an embodiment of the streaming component 340 andstream configuration component 350. The streaming component 340 and thestream configuration component 350 may comprise one or more routines,the one or more routines comprising a sequence of instructions operativeon a processor circuit to perform one or more tasks in the performanceof the operations of the components 340, 350.

A stream transmission routine 443 of the streaming component 340 mayestablish a streaming network connection with a second client device 325at a first client device 320. Establishing a streaming networkconnection may correspond to initiating the streaming network connectionwith the second client device 325 and/or a relay server 390.Establishing a streaming network connection may correspond to receivinga request to initiate a streaming network connection from a secondclient device 325 and/or a relay server 390 being used by the secondclient device 325. Establishing a streaming network connection maycorrespond to performing a request-and-response sequence with the secondclient device 325.

A stream encoding routine 440 of the streaming component 340 may receivemedia content for encoding, such as a locally-captured audio and/orvideo stream. The stream encoding routine 440 may encode the mediacontent for transmission according to one or more audio and/or videostandards. The stream encoding routine 440 may encode the media contentaccording to a target bitrate. Encoding media content according to atarget bitrate may comprise using the target bitrate as a maximumbitrate and as a preferred bitrate for when the media content representsthe intended actual usage of the streaming connection. For example, lessthan the target bitrate may be used where silence, background noise,etc. is represented in VoIP media content instead of the voice of theuser of the first client device 320.

In some embodiments, the streaming network connection may comprise anaudio stream, the assigned target bitrate 390 comprising a maximumencoding bitrate for the audio stream, the maximum encoding bitratelimiting the bandwidth available for encoding the audio stream. Themessaging client 310 may provide the assigned target bitrate 390 to anaudio encoding routine corresponding to the stream encoding routine 440.

At the initiation and during an initial period of the stream the streamencoding routine 440 may encode the media content according to apredefined initial target bitrate, the predefined initial target bitraterepresenting a moderate quality level, neither the highest quality levelor lowest quality level used by the messaging client 310. As such, apredefined initial target bitrate may be less than a predefined maximumbitrate and greater than a predefined minimum bitrate. Once a predefinedperiod of time (e.g., a few seconds) has lapsed, the stream encodingroutine 440 may transition to encoding the media content according to anassigned target bitrate 390 determined based on network performanceinformation by a stream parameter determination routine 457 of thestream configuration component 350. In some embodiments, the predefinedinitial target bitrate may be determined according to information knownabout the network(s) being used, such as using a lower predefinedinitial target bitrate when a cellular data network is being used, orwhere at least a portion of a network transmission path is in particulargeographic regions, as compared to a higher predefined initial targetbitrate used when only Wi-Fi or better data network are being used.

A stream transmission routine 443 may receive the encoded media contentand transmit it via the streaming network connection. Transmitting theencoded media content may comprise dividing the encoded media contentinto network packets and transmitting the network packets in sequence.The transmission of network packets may be performed using thetransmission control protocol (TCP) or user datagram protocol (UDP) inconjunction with the internet protocol (IP) for addressing, as may berepresented as TCP/IP or UDP/IP. The dividing of the encoded mediacontent into network packets may be based on a packet size setting 395assigned to the stream transmission routine 443. In some embodiments,where the stream encoding routine 440 produces encoded media content atless than the target bitrate, network packets smaller than the packetsize setting 395 may be used so as to avoid significant delay in thetransmission of network packets and to provide for maintenance of thestreaming network connection.

At the initiation and during an initial period of the stream the streamtransmission routine 443 may divide the encoded media content accordingto a predefined initial size setting. The predefined initial sizesetting may be equal to the predefined large packet size setting so asto reduce the effective bandwidth usage until the messaging client 310has sufficient network performance information to determine whether theimproved call quality, but increased bandwidth usage, of a smallerpacket size is feasible. Once a predefined period of time (e.g., a fewseconds) has lapsed, the stream transmission routine 443 may transitionto using a packet size setting 395 specified by a stream parameterdetermination routine 457 of the stream configuration component 350.

While, in some embodiments, more than two packet size settings may beused, in some embodiments only two packet size settings may be used: asmall packet size for improved audio quality and a large packet size forimproved network performance. An embodiment may refrain from usingintermediate packet sizes as part of a policy to reduce packet-sizeswitching. The generation of network performance information may bereset during a packet-size switch due to a packet-size switch changingthe rate of packet generation, and therefore the ideal rate of packetreception, and therefore the ideal inter-arrival rate. As such, usingadjustments to the encoding bitrate to respond to possibly-short-termfluctuations in available bandwidth may be preferred over switchingpacket size due to this same resetting of network performanceinformation gathering and the associated delay in the adjustment ofnetwork and encoding parameters. However, packet size switching maystill be used to gain the benefit of improved network performance orimproved audio quality, particularly in the cases of particular good orparticularly poor network performance, as the use of a larger packetsize merely introduces playback delay for the receiving user without thereduction in the encoded audio quality resulting from using a reducedencoding bitrate. Therefore, a low-quality threshold may be used whenmonitoring the round-trip time, which when exceeded causes a largerpacket size to be used, as this low-quality threshold may representsufficiently poor network performance for the network streamconfiguration system 100 to benefit from reserving as much bandwidth aspossible for the media encoding.

The transmission of the encoded media content in packets may include theadditional of one or more headers beyond the data representing theencoded media content. One or more headers may be used to provideaddressing, security information, or other communication information.The effective bandwidth usage of the network stream configuration system100 may be higher than the assigned target bitrate due to the combinedbandwidth usage of the encoded media content and the headers. Eachheader may use a set amount of space for each packet independent of thesize of the packet. As such, for a given encoded bitrate, the effectivebandwidth usage may be higher where a smaller packet size is used andlower where a larger packet size is used, as the header(s) represent alarger portion of the data transmitted where more packets (i.e., smallerpackets) are used than where less packets (i.e., larger packets) areused.

A stream statistics tracking routine 447 may monitor the streamingnetwork connection and generate network performance information aboutthe streaming network connection. The network performance informationmay comprise at least round-trip time information 375 and inter-arrivalrate information 370. In some embodiments, the network performanceinformation may additionally include packet loss information indicatingthe portion or percentage of packets lost in performance of thestreaming network connection. The stream statistics tracking routine 447may provide the network performance information to a streaming componentstatistics reception routine 450.

The stream configuration component 350 may comprise a streamingcomponent statistics reception routine 450. The streaming componentstatistics reception routine 450 may determine inter-arrival rateinformation 370 for the streaming network connection, such as byreceiving the inter-arrival rate information 370 from a streamstatistics tracking routine 447. The streaming component statisticsreception routine 450 may determine round-trip time information 375 forthe streaming network connection, such as by receiving the round-triptime information 375 from the stream statistics tracking routine 447.The inter-arrival rate information 370 and round-trip time information375 may be generated locally by the stream statistics tracking routine447 or may be received by the first client device 320 from the secondclient device 325 over the streaming network connection. The streamtransmission routine 443 may, in some embodiments, transmit the networkperformance information generated by the stream statistics trackingroutine 447 to the messaging client 310 on the second client device 325.

The stream configuration component 350 may comprise an inter-arrivalrate analysis component management routine 453. The inter-arrival rateanalysis component management routine 453 may manage the use of ainter-arrival rate analysis component 360. The inter-arrival rateanalysis component management routine 453 may provide the inter-arrivalrate information 370 to an inter-arrival rate analysis component 360,such as through the use of a functional call, application programinterface (API), or other technique. The inter-arrival rate analysiscomponent management routine 453 may receive a preliminary targetbitrate 380 from the inter-arrival rate analysis component 360 inresponse to providing the inter-arrival rate information 370 to theinter-arrival rate analysis component 360. A preliminary target bitrate380 may comprise a target bitrate estimate made based on theinter-arrival rate information 370 but exclusive of the round-trip timeinformation 375, the preliminary target bitrate 380 determined based onknown techniques for target bitrate determination using inter-arrivalrate information 370. The inter-arrival rate analysis componentmanagement routine 453 may provide the preliminary target bitrate 380 toa stream parameter determination routine 457.

The stream configuration component 350 may comprise a stream parameterdetermination routine 457. The stream parameter determination routine457 may determine an assigned target bitrate 390 and a packet sizesetting 395 for the streaming network connection based on thepreliminary target bitrate 380 and the round-trip time information 375.The stream parameter determination routine 457 may determine, based onthe round-trip time information 375 whether to use the preliminarytarget bitrate 380 as the assigned target bitrate 390 or to replace thepreliminary target bitrate 380 with an alternative target bitrate, suchas a predefined minimum target bitrate or predefined maximum targetbitrate. The stream parameter determination routine 457 may provide theassigned target bitrate 390 to the stream encoding routine 440. Thestream parameter determination routine 457 may further specify a packetsize setting 395, the packet size setting 395 determined based on theround-trip time information 375. As such, the stream parameterdetermination routine 457 may configure the streaming component 340 andstream transmission routine 443 to perform the streaming networkconnection with the assigned target bitrate 390 and the packet sizesetting 395.

FIG. 5 illustrates an embodiment of a branching logic flow 500 for thenetwork stream configuration system 100 of FIG. 1.

The logic flow 500 may begin at block 510. The logic flow 500 may beginin response to a user requesting the initiation of a streaming networkconnection, such as for the performance of a communication task. Ingeneral, the logic flow 500 may end execution at the conclusion of thestreaming network connection.

The logic flow 500 may establish a streaming network connection at block520. Establishing a streaming network connection may comprise using amessaging system 200 to coordinate the establishment of the streamingnetwork connection. A messaging system 200 may identify to an initiatingclient device a destination network address for use in contacting adestination client device, which may correspond to the public-facingnetwork address for the destination client device or may correspond to anetwork address for a relay server 390.

The logic flow 500 may set streaming parameters to predefined startingvalue at block 525. A predefined initial target bitrate may be less thana predefined maximum bitrate and greater than the predefined minimumbitrate. A predefined initial size setting for network packets may beequal to a predefined large packet size setting.

The logic flow 500 may monitor the round-trip time (RTT) for thestreaming network connection at block 530. The logic flow 500 mayfurther monitor the inter-arrival rate for the streaming networkconnection. The logic flow 500 may proceed to perform a series ofcomparisons of the RTT against various thresholds to determine whetherto use a preliminary target bitrate provided by an inter-arrival rateanalysis component 360 or to use an alternative target bitrate. Whilethe preliminary target bitrate provided by the inter-arrival rateanalysis component 360 may typically be a useful target bitrate, in somecases a judgment based on the inter-arrival rate may be inaccurate andthe logic flow 500 may correct the target bitrate based on the RTT.

The logic flow 500 may determine whether the RTT is below avery-high-quality threshold at block 540. The RTT being below avery-high-quality threshold may indicate that the network over which thestreaming network connection is being performed is of a very highquality, as a lower RTT is indicative of better network performance. Assuch, high-quality encodings and network parameters may be used. If theRTT is below the very-high-quality threshold the logic flow 500 mayproceed to block 545. Otherwise, the logic flow 500 may proceed to block550.

The logic flow 500 may fix the assigned target bitrate 390 to apredefined maximum bitrate for a remaining duration of the streamingnetwork connection based on the determined round-trip time informationbeing below the predefined very-high-quality round-trip-time thresholdat block 545. The logic flow 500 may additionally or alternatively fixthe packet size setting 395 to a predefined small packet size based onthe determined round-trip time information being below the predefinedvery-high-quality round-trip-time threshold. In some embodiments, thelogic flow 500 may end execution after fixing the assigned targetbitrate 390 and/or packet size setting 395. In other embodiments,however, fixation may not be used. In these embodiments, the logic flow500 may not include blocks 540 and 545 and may proceed directly fromblock 530 to block 550. In some embodiments, the logic flow 500 may fixonly one of the assigned target bitrate 390 and packet size setting 395and merely assign the other in this particular iteration of the loop ofthe logic flow 500 while leaving that parameter available to set to adifferent value in a later iteration of the loop.

The logic flow may determine whether the RTT is below a high-qualitythreshold at block 550. The RTT being below a high-quality threshold mayindicate that the network over which the streaming network connection isbeing performed is of a high quality. Where a very-high-qualitythreshold associated with network parameter fixation is used, thehigh-quality threshold may be higher than the very-high-qualitythreshold such that there exists a range of RTT value that are lowerthan the high-quality threshold but that are not lower than thevery-high-quality threshold. As such, in some embodiments, the RTT beingbelow the high-quality threshold but not being below thevery-high-quality threshold may indicate the network over which thestreaming network connection is being performed is high-enough qualityto support the maximum bitrate and a small packet size setting, but notyet showing evidence of being sufficiently high-quality to supportfixing the network parameters to their highest-quality settings. If theRTT is below the high-quality threshold the logic flow 500 may proceedto block 555. Otherwise, the logic flow 500 may proceed to block 560.

The logic flow 500 may set the assigned target bitrate 390 to thepredefined maximum bitrate where the determined round-trip timeinformation is below a predefined high-quality round-trip-time thresholdat block 555. The logic flow 500 may further set the packet size settingto a predefined small packet size setting where the determinedround-trip time information is below the predefined high-qualityround-trip-time threshold. The logic flow 500 may then proceed to block530, so as to engage or continue a loop of monitoring networkperformance and assigning network parameters.

The logic flow 500 may determine whether the RTT is above avery-low-quality threshold at block 560. The RTT being above avery-low-quality threshold may indicate that the network over which thestreaming network connection is being performed is of a very lowquality, as a higher RTT is indicative of worse network performance. Itwill be appreciated that a “very low quality” network may correspond toa network operating close to its capacity, and does not necessarilyindicate absolute problems with network infrastructure, networkoperation, etc. As such, low-quality encodings and network parametersmay be used. If the RTT is above the very-low-quality threshold thelogic flow 500 may proceed to block 565. Otherwise, the logic flow 500may proceed to block 570.

The logic flow 500 may fix the assigned target bitrate 390 to apredefined minimum bitrate for a remaining duration of the streamingnetwork connection based on the determined round-trip time informationbeing above the predefined very-low-quality round-trip-time threshold atblock 565. The logic flow 500 may additionally or alternatively fix thepacket size setting 395 to a predefined large packet size based on thedetermined round-trip time information being above the predefinedvery-low-quality round-trip-time threshold. In some embodiments, thelogic flow 500 may end execution after fixing the assigned targetbitrate 390 and/or packet size setting 395. In other embodiments,however, fixation may not be used. In these embodiments, the logic flow500 may not include blocks 560 and 565 and may proceed directly fromblock 550 to block 570 rather than to block 560. In some embodiments,the logic flow 500 may fix only one of the assigned target bitrate 390and packet size setting 395 and merely assign the other in thisparticular iteration of the loop of the logic flow 500 while leavingthat parmeter available to set to a different value in a later iterationof the loop.

The logic flow may determine whether the RTT is above a low-qualitythreshold at block 570. The RTT being above a low-quality threshold mayindicate that the network over which the streaming network connection isbeing performed is of a low quality. Where a very-low-quality thresholdassociated with network parameter fixation is used, the low-qualitythreshold may be lower than the very-low-quality threshold such thatthere exists a range of RTT value that are higher than the low-qualitythreshold but that are not higher than the very-low-quality threshold.As such, in some embodiments, the RTT being above the low-qualitythreshold but not being above the very-low-quality threshold mayindicate the network over which the streaming network connection isbeing performed is low-enough quality to demand the minimum targetbitrate and a large packet size setting, but not yet showing evidence ofbeing sufficiently low-quality to support fixing the network parametersto their lowest-quality settings. If the RTT is above the low-qualitythreshold the logic flow 500 may proceed to block 575. Otherwise, thelogic flow 500 may proceed to block 580.

The logic flow 500 may set the assigned target bitrate 390 to thepredefined minimum bitrate where the determined round-trip timeinformation is below a predefined low-quality round-trip-time thresholdat block 575. The logic flow 500 may further set the packet size settingto a predefined large packet size setting where the determinedround-trip time information is above the predefined low-qualityround-trip-time threshold. The logic flow 500 may then proceed to block530, so as to engage or continue a loop of monitoring networkperformance and assigning network parameters.

The logic flow 500 may set the assigned target bitrate 390 to thepreliminary target bitrate 380 where the round-trip time information isabove a predefined high-quality round-trip-time threshold and below apredefined low-quality round-trip-time threshold at block 580. Theanalysis of the RTT may act as a check on the analysis of theinter-arrival rate performed by the inter-arrival rate analysiscomponent 360, and as such the analysis of the RTT may only determinethe encoding and/or network parameters where an extreme networkcondition is detected. The RTT being between the predefined RTTthresholds may mean that the RTT does not indicate that any extremenetwork conditions are affecting the streaming network connection, andas such the preliminary target bitrate 380 should be used The logic flow500 may then proceed to block 530, so as to engage or continue a loop ofmonitoring network performance and assigning network parameters.

Included herein is a set of flow charts representative of exemplarymethodologies for performing novel aspects of the disclosedarchitecture. While, for purposes of simplicity of explanation, the oneor more methodologies shown herein, for example, in the form of a flowchart or flow diagram, are shown and described as a series of acts, itis to be understood and appreciated that the methodologies are notlimited by the order of acts, as some acts may, in accordance therewith,occur in a different order and/or concurrently with other acts from thatshown and described herein. For example, those skilled in the art willunderstand and appreciate that a methodology could alternatively berepresented as a series of interrelated states or events, such as in astate diagram. Moreover, not all acts illustrated in a methodology maybe required for a novel implementation.

FIG. 6 illustrates one embodiment of a logic flow 600. The logic flow600 may be representative of some or all of the operations executed byone or more embodiments described herein.

In the illustrated embodiment shown in FIG. 6, the logic flow 600 mayestablish a streaming network connection with a second client device ata first client device at block 602.

The logic flow 600 may determine inter-arrival rate information for thestreaming network connection at block 604.

The logic flow 600 may provide the inter-arrival rate information to aninter-arrival rate analysis component at block 606.

The logic flow 600 may receive a preliminary target bitrate from theinter-arrival rate analysis component in response to providing theinter-arrival rate information to the inter-arrival rate analysiscomponent at block 608.

The logic flow 600 may determine round-trip time information for thestreaming network connection at block 610.

The logic flow 600 may determine an assigned target bitrate and a packetsize setting for the streaming network connection based on thepreliminary target bitrate and the round-trip time information at block612.

The logic flow 600 may configure the streaming component to perform thestreaming network connection with the assigned target bitrate and thepacket size setting at block 614.

The embodiments are not limited to this example.

FIG. 7 illustrates a block diagram of a centralized system 700. Thecentralized system 700 may implement some or all of the structure and/oroperations for the network stream configuration system 100 in a singlecomputing entity, such as entirely within a single centralized serverdevice 720.

The centralized server device 720 may comprise any electronic devicecapable of receiving, processing, and sending information for thenetwork stream configuration system 100. Examples of an electronicdevice may include without limitation an ultra-mobile device, a mobiledevice, a personal digital assistant (PDA), a mobile computing device, asmart phone, a telephone, a digital telephone, a cellular telephone,ebook readers, a handset, a one-way pager, a two-way pager, a messagingdevice, a computer, a personal computer (PC), a desktop computer, alaptop computer, a notebook computer, a netbook computer, a handheldcomputer, a tablet computer, a server, a server array or server farm, aweb server, a network server, an Internet server, a work station, amini-computer, a main frame computer, a supercomputer, a networkappliance, a web appliance, a distributed computing system,multiprocessor systems, processor-based systems, consumer electronics,programmable consumer electronics, game devices, television, digitaltelevision, set top box, wireless access point, base station, subscriberstation, mobile subscriber center, radio network controller, router,hub, gateway, bridge, switch, machine, or combination thereof. Theembodiments are not limited in this context.

The centralized server device 720 may execute processing operations orlogic for the network stream configuration system 100 using a processingcomponent 730. The processing component 730 may comprise varioushardware elements, software elements, or a combination of both. Examplesof hardware elements may include devices, logic devices, components,processors, microprocessors, circuits, processor circuits, circuitelements (e.g., transistors, resistors, capacitors, inductors, and soforth), integrated circuits, application specific integrated circuits(ASIC), programmable logic devices (PLD), digital signal processors(DSP), field programmable gate array (FPGA), memory units, logic gates,registers, semiconductor device, chips, microchips, chip sets, and soforth. Examples of software elements may include software components,programs, applications, computer programs, application programs, systemprograms, software development programs, machine programs, operatingsystem software, middleware, firmware, software modules, routines,subroutines, functions, methods, procedures, software interfaces,application program interfaces (API), instruction sets, computing code,computer code, code segments, computer code segments, words, values,symbols, or any combination thereof. Determining whether an embodimentis implemented using hardware elements and/or software elements may varyin accordance with any number of factors, such as desired computationalrate, power levels, heat tolerances, processing cycle budget, input datarates, output data rates, memory resources, data bus speeds and otherdesign or performance constraints, as desired for a givenimplementation.

The centralized server device 720 may execute communications operationsor logic for the network stream configuration system 100 usingcommunications component 740. The communications component 740 mayimplement any well-known communications techniques and protocols, suchas techniques suitable for use with packet-switched networks (e.g.,public networks such as the Internet, private networks such as anenterprise intranet, and so forth), circuit-switched networks (e.g., thepublic switched telephone network), or a combination of packet-switchednetworks and circuit-switched networks (with suitable gateways andtranslators). The communications component 740 may include various typesof standard communication elements, such as one or more communicationsinterfaces, network interfaces, network interface cards (NIC), radios,wireless transmitters/receivers (transceivers), wired and/or wirelesscommunication media, physical connectors, and so forth. By way ofexample, and not limitation, communication media 712 includes wiredcommunications media and wireless communications media. Examples ofwired communications media may include a wire, cable, metal leads,printed circuit boards (PCB), backplanes, switch fabrics, semiconductormaterial, twisted-pair wire, co-axial cable, fiber optics, a propagatedsignal, and so forth. Examples of wireless communications media mayinclude acoustic, radio-frequency (RF) spectrum, infrared and otherwireless media.

The centralized server device 720 may communicate with other devicesover a communications media 712 using communications signals 714 via thecommunications component 740. The centralized server device 720 mayexecute a relay server 390, the relay server 390 operative to assist inthe performance of streaming network connections. The relay server 390may receive and forward network packets between the first client device320 and second client device 325 as assistance to the performance of astreaming network connection, the receiving and forwarding of networkpackets comprising at least a portion of the signals 714 transmitted viamedia 712.

FIG. 8 illustrates a block diagram of a distributed system 800. Thedistributed system 800 may distribute portions of the structure and/oroperations for the network stream configuration system 100 acrossmultiple computing entities. Examples of distributed system 800 mayinclude without limitation a client-server architecture, a 3-tierarchitecture, an N-tier architecture, a tightly-coupled or clusteredarchitecture, a peer-to-peer architecture, a master-slave architecture,a shared database architecture, and other types of distributed systems.The embodiments are not limited in this context.

The distributed system 800 may comprise a plurality of server devices810. In general, the server devices 810 may be the same or similar tothe centralized server device 720 as described with reference to FIG. 7.For instance, the server devices 810 may each comprise a processingcomponent 830 and a communications component 840 which are the same orsimilar to the processing component 730 and the communications component740, respectively, as described with reference to FIG. 7. In anotherexample, the server devices 810 may communicate over a communicationsmedia 812 using communications signals 814 via the communicationscomponents 840.

The server devices 810 may comprise or employ one or more programs thatoperate to perform various methodologies in accordance with thedescribed embodiments. In one embodiment, for example, the serverdevices 810 may each implement a relay server of a plurality of relayservers 190, as described with reference to FIG. 1.

FIG. 9 illustrates an embodiment of an exemplary computing architecture900 suitable for implementing various embodiments as previouslydescribed. In one embodiment, the computing architecture 900 maycomprise or be implemented as part of an electronic device. Examples ofan electronic device may include those described with reference to FIGS.1, 3, 7, and 8, among others, such as the client devices 120, the firstclient device 320, the second client device 325, the centralized serverdevice 720, and the server devices 810. The embodiments are not limitedin this context.

As used in this application, the terms “system” and “component” areintended to refer to a computer-related entity, either hardware, acombination of hardware and software, software, or software inexecution, examples of which are provided by the exemplary computingarchitecture 900. For example, a component can be, but is not limited tobeing, a process running on a processor, a processor, a hard disk drive,multiple storage drives (of optical and/or magnetic storage medium), anobject, an executable, a thread of execution, a program, and/or acomputer. By way of illustration, both an application running on aserver and the server can be a component. One or more components canreside within a process and/or thread of execution, and a component canbe localized on one computer and/or distributed between two or morecomputers. Further, components may be communicatively coupled to eachother by various types of communications media to coordinate operations.The coordination may involve the uni-directional or bi-directionalexchange of information. For instance, the components may communicateinformation in the form of signals communicated over the communicationsmedia. The information can be implemented as signals allocated tovarious signal lines. In such allocations, each message is a signal.Further embodiments, however, may alternatively employ data messages.Such data messages may be sent across various connections. Exemplaryconnections include parallel interfaces, serial interfaces, and businterfaces.

The computing architecture 900 includes various common computingelements, such as one or more processors, multi-core processors,co-processors, memory units, chipsets, controllers, peripherals,interfaces, oscillators, timing devices, video cards, audio cards,multimedia input/output (I/O) components, power supplies, and so forth.The embodiments, however, are not limited to implementation by thecomputing architecture 900.

As shown in FIG. 9, the computing architecture 900 comprises aprocessing unit 904, a system memory 906 and a system bus 908. Theprocessing unit 904 can be any of various commercially availableprocessors, including without limitation an AMD® Athlon®, Duron® andOpteron® processors; ARM® application, embedded and secure processors;IBM® and Motorola® DragonBall® and PowerPC® processors; IBM and Sony®Cell processors; Intel® Celeron®, Core (2) Duo®, Itanium®, Pentium®,Xeon®, and XScale® processors; and similar processors. Dualmicroprocessors, multi-core processors, and other multi-processorarchitectures may also be employed as the processing unit 904.

The system bus 908 provides an interface for system componentsincluding, but not limited to, the system memory 906 to the processingunit 904. The system bus 908 can be any of several types of busstructure that may further interconnect to a memory bus (with or withouta memory controller), a peripheral bus, and a local bus using any of avariety of commercially available bus architectures. Interface adaptersmay connect to the system bus 908 via a slot architecture. Example slotarchitectures may include without limitation Accelerated Graphics Port(AGP), Card Bus, (Extended) Industry Standard Architecture ((E)ISA),Micro Channel Architecture (MCA), NuBus, Peripheral ComponentInterconnect (Extended) (PCI(X)), PCI Express, Personal Computer MemoryCard International Association (PCMCIA), and the like.

The computing architecture 900 may comprise or implement variousarticles of manufacture. An article of manufacture may comprise acomputer-readable storage medium to store logic. Examples of acomputer-readable storage medium may include any tangible media capableof storing electronic data, including volatile memory or non-volatilememory, removable or non-removable memory, erasable or non-erasablememory, writeable or re-writeable memory, and so forth. Examples oflogic may include executable computer program instructions implementedusing any suitable type of code, such as source code, compiled code,interpreted code, executable code, static code, dynamic code,object-oriented code, visual code, and the like. Embodiments may also beat least partly implemented as instructions contained in or on anon-transitory computer-readable medium, which may be read and executedby one or more processors to enable performance of the operationsdescribed herein.

The system memory 906 may include various types of computer-readablestorage media in the form of one or more higher speed memory units, suchas read-only memory (ROM), random-access memory (RAM), dynamic RAM(DRAM), Double-Data-Rate DRAM (DDRAM), synchronous DRAM (SDRAM), staticRAM (SRAM), programmable ROM (PROM), erasable programmable ROM (EPROM),electrically erasable programmable ROM (EEPROM), flash memory, polymermemory such as ferroelectric polymer memory, ovonic memory, phase changeor ferroelectric memory, silicon-oxide-nitride-oxide-silicon (SONOS)memory, magnetic or optical cards, an array of devices such as RedundantArray of Independent Disks (RAID) drives, solid state memory devices(e.g., USB memory, solid state drives (SSD) and any other type ofstorage media suitable for storing information. In the illustratedembodiment shown in FIG. 9, the system memory 906 can includenon-volatile memory 910 and/or volatile memory 912. A basic input/outputsystem (BIOS) can be stored in the non-volatile memory 910.

The computer 902 may include various types of computer-readable storagemedia in the form of one or more lower speed memory units, including aninternal (or external) hard disk drive (HDD) 914, a magnetic floppy diskdrive (FDD) 916 to read from or write to a removable magnetic disk 918,and an optical disk drive 920 to read from or write to a removableoptical disk 922 (e.g., a CD-ROM or DVD). The HDD 914, FDD 916 andoptical disk drive 920 can be connected to the system bus 908 by a HDDinterface 924, an FDD interface 926 and an optical drive interface 928,respectively. The HDD interface 924 for external drive implementationscan include at least one or both of Universal Serial Bus (USB) and IEEE1394 interface technologies.

The drives and associated computer-readable media provide volatileand/or nonvolatile storage of data, data structures, computer-executableinstructions, and so forth. For example, a number of program modules canbe stored in the drives and memory units 910, 912, including anoperating system 930, one or more application programs 932, otherprogram modules 934, and program data 936. In one embodiment, the one ormore application programs 932, other program modules 934, and programdata 936 can include, for example, the various applications and/orcomponents of the network stream configuration system 100.

A user can enter commands and information into the computer 902 throughone or more wire/wireless input devices, for example, a keyboard 938 anda pointing device, such as a mouse 940. Other input devices may includemicrophones, infra-red (IR) remote controls, radio-frequency (RF) remotecontrols, game pads, stylus pens, card readers, dongles, finger printreaders, gloves, graphics tablets, joysticks, keyboards, retina readers,touch screens (e.g., capacitive, resistive, etc.), trackballs,trackpads, sensors, styluses, and the like. These and other inputdevices are often connected to the processing unit 904 through an inputdevice interface 942 that is coupled to the system bus 908, but can beconnected by other interfaces such as a parallel port, IEEE 1394 serialport, a game port, a USB port, an IR interface, and so forth.

A monitor 944 or other type of display device is also connected to thesystem bus 908 via an interface, such as a video adaptor 946. Themonitor 944 may be internal or external to the computer 902. In additionto the monitor 944, a computer typically includes other peripheraloutput devices, such as speakers, printers, and so forth.

The computer 902 may operate in a networked environment using logicalconnections via wire and/or wireless communications to one or moreremote computers, such as a remote computer 948. The remote computer 948can be a workstation, a server computer, a router, a personal computer,portable computer, microprocessor-based entertainment appliance, a peerdevice or other common network node, and typically includes many or allof the elements described relative to the computer 902, although, forpurposes of brevity, only a memory/storage device 950 is illustrated.The logical connections depicted include wire/wireless connectivity to alocal area network (LAN) 952 and/or larger networks, for example, a widearea network (WAN) 954. Such LAN and WAN networking environments arecommonplace in offices and companies, and facilitate enterprise-widecomputer networks, such as intranets, all of which may connect to aglobal communications network, for example, the Internet.

When used in a LAN networking environment, the computer 902 is connectedto the LAN 952 through a wire and/or wireless communication networkinterface or adaptor 956. The adaptor 956 can facilitate wire and/orwireless communications to the LAN 952, which may also include awireless access point disposed thereon for communicating with thewireless functionality of the adaptor 956.

When used in a WAN networking environment, the computer 902 can includea modem 958, or is connected to a communications server on the WAN 954,or has other means for establishing communications over the WAN 954,such as by way of the Internet. The modem 958, which can be internal orexternal and a wire and/or wireless device, connects to the system bus908 via the input device interface 942. In a networked environment,program modules depicted relative to the computer 902, or portionsthereof, can be stored in the remote memory/storage device 950. It willbe appreciated that the network connections shown are exemplary andother means of establishing a communications link between the computerscan be used.

The computer 902 is operable to communicate with wire and wirelessdevices or entities using the IEEE 802 family of standards, such aswireless devices operatively disposed in wireless communication (e.g.,IEEE 802.9 over-the-air modulation techniques). This includes at leastWi-Fi (or Wireless Fidelity), WiMax, and Bluetooth™ wirelesstechnologies, among others. Thus, the communication can be a predefinedstructure as with a conventional network or simply an ad hoccommunication between at least two devices. Wi-Fi networks use radiotechnologies called IEEE 802.9x (a, b, g, n, etc.) to provide secure,reliable, fast wireless connectivity. A Wi-Fi network can be used toconnect computers to each other, to the Internet, and to wire networks(which use IEEE 802.3-related media and functions).

FIG. 10 illustrates a block diagram of an exemplary communicationsarchitecture 1000 suitable for implementing various embodiments aspreviously described. The communications architecture 1000 includesvarious common communications elements, such as a transmitter, receiver,transceiver, radio, network interface, baseband processor, antenna,amplifiers, filters, power supplies, and so forth. The embodiments,however, are not limited to implementation by the communicationsarchitecture 1000.

As shown in FIG. 10, the communications architecture 1000 comprisesincludes one or more clients 1002 and servers 1004. The clients 1002 mayimplement the first server device 910. The servers 1004 may implementthe second server device 950. The clients 1002 and the servers 1004 areoperatively connected to one or more respective client data stores 1008and server data stores 1010 that can be employed to store informationlocal to the respective clients 1002 and servers 1004, such as cookiesand/or associated contextual information.

The clients 1002 and the servers 1004 may communicate informationbetween each other using a communication framework 1006. Thecommunications framework 1006 may implement any well-knowncommunications techniques and protocols. The communications framework1006 may be implemented as a packet-switched network (e.g., publicnetworks such as the Internet, private networks such as an enterpriseintranet, and so forth), a circuit-switched network (e.g., the publicswitched telephone network), or a combination of a packet-switchednetwork and a circuit-switched network (with suitable gateways andtranslators).

The communications framework 1006 may implement various networkinterfaces arranged to accept, communicate, and connect to acommunications network. A network interface may be regarded as aspecialized form of an input output interface. Network interfaces mayemploy connection protocols including without limitation direct connect,Ethernet (e.g., thick, thin, twisted pair 10/100/1000 Base T, and thelike), token ring, wireless network interfaces, cellular networkinterfaces, IEEE 802.11a-x network interfaces, IEEE 802.16 networkinterfaces, IEEE 802.20 network interfaces, and the like. Further,multiple network interfaces may be used to engage with variouscommunications network types. For example, multiple network interfacesmay be employed to allow for the communication over broadcast,multicast, and unicast networks. Should processing requirements dictatea greater amount speed and capacity, distributed network controllerarchitectures may similarly be employed to pool, load balance, andotherwise increase the communicative bandwidth required by clients 1002and the servers 1004. A communications network may be any one and thecombination of wired and/or wireless networks including withoutlimitation a direct interconnection, a secured custom connection, aprivate network (e.g., an enterprise intranet), a public network (e.g.,the Internet), a Personal Area Network (PAN), a Local Area Network(LAN), a Metropolitan Area Network (MAN), an Operating Missions as Nodeson the Internet (OMNI), a Wide Area Network (WAN), a wireless network, acellular network, and other communications networks.

FIG. 11 illustrates an embodiment of a device 1100 for use in amulticarrier OFDM system, such as the network stream configurationsystem 100. Device 1100 may implement, for example, software components1160 as described with reference to network stream configuration system100 and/or a logic circuit 1135. The logic circuit 1135 may includephysical circuits to perform operations described for the network streamconfiguration system 100. As shown in FIG. 11, device 1100 may include aradio interface 1110, baseband circuitry 1120, and computing platform1130, although embodiments are not limited to this configuration.

The device 1100 may implement some or all of the structure and/oroperations for the network stream configuration system 100 and/or logiccircuit 1135 in a single computing entity, such as entirely within asingle device. Alternatively, the device 1100 may distribute portions ofthe structure and/or operations for the network stream configurationsystem 100 and/or logic circuit 1135 across multiple computing entitiesusing a distributed system architecture, such as a client-serverarchitecture, a 3-tier architecture, an N-tier architecture, atightly-coupled or clustered architecture, a peer-to-peer architecture,a master-slave architecture, a shared database architecture, and othertypes of distributed systems. The embodiments are not limited in thiscontext.

In one embodiment, radio interface 1110 may include a component orcombination of components adapted for transmitting and/or receivingsingle carrier or multi-carrier modulated signals (e.g., includingcomplementary code keying (CCK) and/or orthogonal frequency divisionmultiplexing (OFDM) symbols) although the embodiments are not limited toany specific over-the-air interface or modulation scheme. Radiointerface 1110 may include, for example, a receiver 1112, a transmitter1116 and/or a frequency synthesizer 1114. Radio interface 1110 mayinclude bias controls, a crystal oscillator and/or one or more antennas1118. In another embodiment, radio interface 1110 may use externalvoltage-controlled oscillators (VCOs), surface acoustic wave filters,intermediate frequency (IF) filters and/or RF filters, as desired. Dueto the variety of potential RF interface designs an expansivedescription thereof is omitted.

Baseband circuitry 1120 may communicate with radio interface 1110 toprocess receive and/or transmit signals and may include, for example, ananalog-to-digital converter 1122 for down converting received signals, adigital-to-analog converter 1124 for up converting signals fortransmission. Further, baseband circuitry 1120 may include a baseband orphysical layer (PHY) processing circuit 1156 for PHY link layerprocessing of respective receive/transmit signals. Baseband circuitry1120 may include, for example, a processing circuit 1128 for mediumaccess control (MAC)/data link layer processing. Baseband circuitry 1120may include a memory controller 1132 for communicating with processingcircuit 1128 and/or a computing platform 1130, for example, via one ormore interfaces 1134.

In some embodiments, PHY processing circuit 1126 may include a frameconstruction and/or detection module, in combination with additionalcircuitry such as a buffer memory, to construct and/or deconstructcommunication frames, such as radio frames. Alternatively or inaddition, MAC processing circuit 1128 may share processing for certainof these functions or perform these processes independent of PHYprocessing circuit 1126. In some embodiments, MAC and PHY processing maybe integrated into a single circuit.

The computing platform 1130 may provide computing functionality for thedevice 1100. As shown, the computing platform 1130 may include aprocessing component 1140. In addition to, or alternatively of, thebaseband circuitry 1120, the device 1100 may execute processingoperations or logic for the network stream configuration system 100 andlogic circuit 1135 using the processing component 1140. The processingcomponent 1140 (and/or PHY 1126 and/or MAC 1128) may comprise varioushardware elements, software elements, or a combination of both. Examplesof hardware elements may include devices, logic devices, components,processors, microprocessors, circuits, processor circuits, circuitelements (e.g., transistors, resistors, capacitors, inductors, and soforth), integrated circuits, application specific integrated circuits(ASIC), programmable logic devices (PLD), digital signal processors(DSP), field programmable gate array (FPGA), memory units, logic gates,registers, semiconductor device, chips, microchips, chip sets, and soforth. Examples of software elements may include software components,programs, applications, computer programs, application programs, systemprograms, software development programs, machine programs, operatingsystem software, middleware, firmware, software modules, routines,subroutines, functions, methods, procedures, software interfaces,application program interfaces (API), instruction sets, computing code,computer code, code segments, computer code segments, words, values,symbols, or any combination thereof. Determining whether an embodimentis implemented using hardware elements and/or software elements may varyin accordance with any number of factors, such as desired computationalrate, power levels, heat tolerances, processing cycle budget, input datarates, output data rates, memory resources, data bus speeds and otherdesign or performance constraints, as desired for a givenimplementation.

The computing platform 1130 may further include other platformcomponents 1150. Other platform components 1150 include common computingelements, such as one or more processors, multi-core processors,co-processors, memory units, chipsets, controllers, peripherals,interfaces, oscillators, timing devices, video cards, audio cards,multimedia input/output (I/O) components (e.g., digital displays), powersupplies, and so forth. Examples of memory units may include withoutlimitation various types of computer readable and machine readablestorage media in the form of one or more higher speed memory units, suchas read-only memory (ROM), random-access memory (RAM), dynamic RAM(DRAM), Double-Data-Rate DRAM (DDRAM), synchronous DRAM (SDRAM), staticRAM (SRAM), programmable ROM (PROM), erasable programmable ROM (EPROM),electrically erasable programmable ROM (EEPROM), flash memory, polymermemory such as ferroelectric polymer memory, ovonic memory, phase changeor ferroelectric memory, silicon-oxide-nitride-oxide-silicon (SONOS)memory, magnetic or optical cards, an array of devices such as RedundantArray of Independent Disks (RAID) drives, solid state memory devices(e.g., USB memory, solid state drives (SSD) and any other type ofstorage media suitable for storing information.

Device 1100 may be, for example, an ultra-mobile device, a mobiledevice, a fixed device, a machine-to-machine (M2M) device, a personaldigital assistant (PDA), a mobile computing device, a smart phone, atelephone, a digital telephone, a cellular telephone, user equipment,eBook readers, a handset, a one-way pager, a two-way pager, a messagingdevice, a computer, a personal computer (PC), a desktop computer, alaptop computer, a notebook computer, a netbook computer, a handheldcomputer, a tablet computer, a server, a server array or server farm, aweb server, a network server, an Internet server, a work station, amini-computer, a main frame computer, a supercomputer, a networkappliance, a web appliance, a distributed computing system,multiprocessor systems, processor-based systems, consumer electronics,programmable consumer electronics, game devices, television, digitaltelevision, set top box, wireless access point, base station, node B,evolved node B (eNB), subscriber station, mobile subscriber center,radio network controller, router, hub, gateway, bridge, switch, machine,or combination thereof. Accordingly, functions and/or specificconfigurations of device 1100 described herein, may be included oromitted in various embodiments of device 1100, as suitably desired. Insome embodiments, device 1100 may be configured to be compatible withprotocols and frequencies associated one or more of the 3GPP LTESpecifications and/or IEEE 1102.16 Standards for WMANs, and/or otherbroadband wireless networks, cited herein, although the embodiments arenot limited in this respect.

Embodiments of device 1100 may be implemented using single input singleoutput (SISO) architectures. However, certain implementations mayinclude multiple antennas (e.g., antennas 1118) for transmission and/orreception using adaptive antenna techniques for beamforming or spatialdivision multiple access (SDMA) and/or using MIMO communicationtechniques.

The components and features of device 1100 may be implemented using anycombination of discrete circuitry, application specific integratedcircuits (ASICs), logic gates and/or single chip architectures. Further,the features of device 1100 may be implemented using microcontrollers,programmable logic arrays and/or microprocessors or any combination ofthe foregoing where suitably appropriate. It is noted that hardware,firmware and/or software elements may be collectively or individuallyreferred to herein as “logic” or “circuit.”

It should be appreciated that the exemplary device 1100 shown in theblock diagram of FIG. 11 may represent one functionally descriptiveexample of many potential implementations. Accordingly, division,omission or inclusion of block functions depicted in the accompanyingfigures does not infer that the hardware components, circuits, softwareand/or elements for implementing these functions would be necessarily bedivided, omitted, or included in embodiments.

A computer-implemented method may comprise establishing a streamingnetwork connection with a second client device at a first client device;determining inter-arrival rate information for the streaming networkconnection; providing the inter-arrival rate information to aninter-arrival rate analysis component; receiving a preliminary targetbitrate from the inter-arrival rate analysis component in response toproviding the inter-arrival rate information to the inter-arrival rateanalysis component; determining round-trip time information for thestreaming network connection; determining an assigned target bitrate anda packet size setting for the streaming network connection based on thepreliminary target bitrate and the round-trip time information; andconfiguring the streaming network connection with the assigned targetbitrate and the packet size setting.

A computer-implemented method may further comprise the streaming networkconnection transmitted via a relay server device.

A computer-implemented method may further comprise the streaming networkconnection comprising an audio stream, the assigned target bitratecomprising a maximum encoding bitrate for the audio stream, furthercomprising: providing the assigned target bitrate to an audio encodingroutine.

A computer-implemented method may further comprise configuring thestreaming network connection with a predefined initial target bitrate,the predefined initial target bitrate less than the predefined maximumbitrate, the predefined initial target bitrate greater than thepredefined minimum bitrate; and configuring the streaming networkconnection with a predefined initial packet size setting, the predefinedinitial size setting equal to a predefined large packet size setting.

A computer-implemented method may further comprise wherein determiningthe assigned target bitrate comprises setting the assigned targetbitrate to a predefined maximum bitrate where the determined round-triptime information is below a predefined high-quality round-trip-timethreshold.

A computer-implemented method may further comprise wherein determiningthe packet size setting comprises setting the packet size setting to apredefined small packet size setting where the determined round-triptime information is below the predefined high-quality round-trip-timethreshold.

A computer-implemented method may further comprise wherein determiningthe assigned target bitrate comprises fixing the assigned target bitrateto a predefined maximum bitrate for a remaining duration of thestreaming network connection where the determined round-trip timeinformation is below a predefined very-high-quality round-trip-timethreshold.

A computer-implemented method may further comprise wherein determiningthe assigned target bitrate and the packet size setting comprisessetting the assigned target bitrate to a predefined minimum bitrate andsetting the packet size setting to a predefined large packet sizesetting where the determined round-trip time information above apredefined low-quality round-trip-time threshold.

A computer-implemented method may further comprise wherein determiningthe packet size setting comprises setting the packet size setting to apredefined large packet size setting for a remaining duration of thestreaming network connection where the determined round-trip timeinformation is above a predefined very-low-quality round-trip-timethreshold.

A computer-implemented method may further comprise wherein determiningthe assigned target bitrate comprises setting the assigned targetbitrate to the preliminary target bitrate where the round-trip timeinformation is above a predefined high-quality round-trip-time thresholdand below a predefined low-quality round-trip-time threshold.

An apparatus may comprise a processor circuit on a device; a streamingcomponent operative on the processor circuit to establish a streamingnetwork connection with a second client device at a first client device;and a stream configuration component operative on the processor circuitto determine inter-arrival rate information for the streaming networkconnection; provide the inter-arrival rate information to aninter-arrival rate analysis component; receive a preliminary targetbitrate from the inter-arrival rate analysis component in response toproviding the inter-arrival rate information to the inter-arrival rateanalysis component; determine round-trip time information for thestreaming network connection; determine an assigned target bitrate and apacket size setting for the streaming network connection based on thepreliminary target bitrate and the round-trip time information; andconfigure the streaming component to perform the streaming networkconnection with the assigned target bitrate and the packet size setting.The apparatus may be operative to implement any of thecomputer-implemented methods described herein.

At least one computer-readable storage medium may comprise instructionsthat, when executed, cause a system to perform any of thecomputer-implemented methods described herein.

Some embodiments may be described using the expression “one embodiment”or “an embodiment” along with their derivatives. These terms mean that aparticular feature, structure, or characteristic described in connectionwith the embodiment is included in at least one embodiment. Theappearances of the phrase “in one embodiment” in various places in thespecification are not necessarily all referring to the same embodiment.Further, some embodiments may be described using the expression“coupled” and “connected” along with their derivatives. These terms arenot necessarily intended as synonyms for each other. For example, someembodiments may be described using the terms “connected” and/or“coupled” to indicate that two or more elements are in direct physicalor electrical contact with each other. The term “coupled,” however, mayalso mean that two or more elements are not in direct contact with eachother, but yet still co-operate or interact with each other.

With general reference to notations and nomenclature used herein, thedetailed descriptions herein may be presented in terms of programprocedures executed on a computer or network of computers. Theseprocedural descriptions and representations are used by those skilled inthe art to most effectively convey the substance of their work to othersskilled in the art.

A procedure is here, and generally, conceived to be a self-consistentsequence of operations leading to a desired result. These operations arethose requiring physical manipulations of physical quantities. Usually,though not necessarily, these quantities take the form of electrical,magnetic or optical signals capable of being stored, transferred,combined, compared, and otherwise manipulated. It proves convenient attimes, principally for reasons of common usage, to refer to thesesignals as bits, values, elements, symbols, characters, terms, numbers,or the like. It should be noted, however, that all of these and similarterms are to be associated with the appropriate physical quantities andare merely convenient labels applied to those quantities.

Further, the manipulations performed are often referred to in terms,such as adding or comparing, which are commonly associated with mentaloperations performed by a human operator. No such capability of a humanoperator is necessary, or desirable in most cases, in any of theoperations described herein which form part of one or more embodiments.Rather, the operations are machine operations. Useful machines forperforming operations of various embodiments include general purposedigital computers or similar devices.

Various embodiments also relate to apparatus or systems for performingthese operations. This apparatus may be specially constructed for therequired purpose or it may comprise a general purpose computer asselectively activated or reconfigured by a computer program stored inthe computer. The procedures presented herein are not inherently relatedto a particular computer or other apparatus. Various general purposemachines may be used with programs written in accordance with theteachings herein, or it may prove convenient to construct morespecialized apparatus to perform the required method steps. The requiredstructure for a variety of these machines will appear from thedescription given.

It is emphasized that the Abstract of the Disclosure is provided toallow a reader to quickly ascertain the nature of the technicaldisclosure. It is submitted with the understanding that it will not beused to interpret or limit the scope or meaning of the claims. Inaddition, in the foregoing Detailed Description, it can be seen thatvarious features are grouped together in a single embodiment for thepurpose of streamlining the disclosure. This method of disclosure is notto be interpreted as reflecting an intention that the claimedembodiments require more features than are expressly recited in eachclaim. Rather, as the following claims reflect, inventive subject matterlies in less than all features of a single disclosed embodiment. Thusthe following claims are hereby incorporated into the DetailedDescription, with each claim standing on its own as a separateembodiment. In the appended claims, the terms “including” and “in which”are used as the plain-English equivalents of the respective terms“comprising” and “wherein,” respectively. Moreover, the terms “first,”“second,” “third,” and so forth, are used merely as labels, and are notintended to impose numerical requirements on their objects.

What has been described above includes examples of the disclosedarchitecture. It is, of course, not possible to describe everyconceivable combination of components and/or methodologies, but one ofordinary skill in the art may recognize that many further combinationsand permutations are possible. Accordingly, the novel architecture isintended to embrace all such alterations, modifications and variationsthat fall within the spirit and scope of the appended claims.

What is claimed is:
 1. A non-transitory computer-readable medium storinginstructions that, when executed by a processor, cause the processor to:establish a streaming network connection involving a first client deviceand a second client device; identify a preliminary target bitrate forthe streaming network connection; determine round-trip time informationfor the streaming network connection; adjust the preliminary targetbitrate based on the round-trip time information to set an assignedtarget bitrate; and configure the streaming network connection based onthe assigned target bitrate.
 2. The medium of claim 1, wherein adjustingthe preliminary target bitrate comprises determining that the round-triptime information is below a predefined high-quality round-trip-timethreshold, and setting the assigned target bitrate to a predefinedmaximum target bitrate in response to the determining.
 3. The medium ofclaim 1, wherein adjusting the preliminary target bitrate comprisesdetermining that the round-trip time information is above a predefinedlow-quality round-trip-time threshold, and setting the assigned targetbitrate to a predefined minimum target bitrate in response to thedetermining.
 4. The medium of claim 1, further comprising determining apacket size for the streaming network connection based on thepreliminary target bitrate and the round-trip time information, andconfiguring the streaming network connection based on the determinedpacket size.
 5. The medium of claim 4, wherein configuring the streamingnetwork connection comprises dividing encoded media content into networkpackets based on the determined packet size.
 6. The medium of claim 4,wherein the streaming network connection is associated with a predefinedlarge packet size setting associated with reduced effective bandwidthusage and a predefined small packet size setting associated withimproved streaming content quality, and determining the packet size iscomprises selecting between the predefined large packet size setting andthe predefined small packet size setting.
 7. The medium of claim 6,further storing instructions for: setting the packet size to apredetermined initial size setting for a predetermined initial period ofthe streaming network connection, the predetermined initial size settingbeing equal to the predefined large packet size setting.
 8. The mediumof claim 6, wherein determining the packet size comprises comparing theround-trip time to a predetermined low-quality threshold, and selectingthe predefined large packet size when the round-trip time exceeds thepredetermined low-quality threshold.
 9. The medium of claim 1, whereinthe assigned target bitrate is fixed to a predefined maximum bitrate fora remaining duration of the streaming network connection when thedetermined round-trip time information is below a predefinedvery-high-quality round-trip-time threshold.
 10. The medium of claim 4,wherein determining the packet size setting comprises setting the packetsize setting to a predefined large packet size setting for a remainingduration of the streaming network connection when the determinedround-trip time information is above a predefined very-low-qualityround-trip-time threshold.
 11. A system comprising: a processor circuit;a network interface configured to establish a streaming networkconnection involving a first client device and a second client device; astreaming component to identify a preliminary target bitrate for thestreaming network connection, determine round-trip time information forthe streaming network connection, and adjust the preliminary targetbitrate based on the round-trip time information to set an assignedtarget bitrate; and a stream configuration component to configure thestreaming network connection based on the assigned target bitrate. 12.The system of claim 11, wherein adjusting the preliminary target bitratecomprises determining that the round-trip time information is below apredefined high-quality round-trip-time threshold, and setting theassigned target bitrate to a predefined maximum target bitrate inresponse to the determining.
 13. The system of claim 11, whereinadjusting the preliminary target bitrate comprises determining that theround-trip time information is above a predefined low-qualityround-trip-time threshold, and setting the assigned target bitrate to apredefined minimum target bitrate in response to the determining. 14.The system of claim 11, wherein the streaming component is furtherconfigured to determine a packet size for the streaming networkconnection based on the preliminary target bitrate and the round-triptime information, and configuring the streaming network connection basedon the determined packet size.
 15. The system of claim 14, whereinconfiguring the streaming network connection comprises dividing encodedmedia content into network packets based on the determined packet size.16. The system of claim 14, wherein the streaming network connection isassociated with a predefined large packet size setting associated withreduced effective bandwidth usage and a predefined small packet sizesetting associated with improved streaming content quality, anddetermining the packet size is comprises selecting between thepredefined large packet size setting and the predefined small packetsize setting.
 17. The system of claim 16, wherein the streamingcomponent is further configured to set the packet size to apredetermined initial size setting for a predetermined initial period ofthe streaming network connection, the predetermined initial size settingbeing equal to the predefined large packet size setting.
 18. The systemof claim 16, wherein determining the packet size comprises comparing theround-trip time to a predetermined low-quality threshold, and selectingthe predefined large packet size when the round-trip time exceeds thepredetermined low-quality threshold.
 19. The system of claim 11, whereinthe assigned target bitrate is fixed to a predefined maximum bitrate fora remaining duration of the streaming network connection when thedetermined round-trip time information is below a predefinedvery-high-quality round-trip-time threshold.
 20. A method comprising:establishing a streaming network connection involving a first clientdevice and a second client device; identifying a preliminary targetbitrate for the streaming network connection; determining round-triptime information for the streaming network connection; adjusting thepreliminary target bitrate based on the round-trip time information toset an assigned target bitrate; and configuring the streaming networkconnection based on the assigned target bitrate.